.nav{
    display: flex;
    flex-wrap: wrap;
}
.nav .box{
    display: flex;
    flex-direction: column;
    align-items:center;
    width: 25%;
    padding: 10px 0;
}
.nav .box{
    text-align: center;
}
.nav img{
    height: 1.333333rem;
    margin-bottom: 5px;
}
.ul1>li{
    border: 1px solid rgb(221,221,221);
    display: flex;
    justify-content: space-between;
    height: 1.0488rem;
    background-color: #F5F5F5;
    line-height: 1.0488rem;
    padding: 0px 10px;
    font-size: 15px;
}
.ul2{
    display: flex;
    flex-wrap: wrap;
}
.ul2>a{
    display: block;
    width: 25%;
    box-sizing: border-box;
    height: 1.093333rem;
    border: 1px solid rgb(204,204,204);
    text-align: center;
    line-height: 1.093333rem;
}
.ul2>a>li{
    height: 1.093333rem;
}